public class Circular {
	Circle bottom;
	double height;
	void setBottom(Circle c) {
	   bottom = c;
	}
	void setHeight(double h) {
	   height = h;
	}
	double getVolme() {
	   if(bottom == null)
	     return -1;
	   else
	     return bottom.getArea()*height/3.0;
	}
	double getBottomRadius() {
	   return bottom.getRadius();
	}
	public void setBottomRadius(double r) {
	   bottom.setRadius(r);
	}
}